Fix issue related to switching to BT headset

Dialer sends two back to back setAudioRoute requests
to Telecom when switching call audio to BT headset.
First request is sent without BT device address and second
request is sent with actual BT device address.
These back to back requests cause issues in BT SCO connection.
Hence remove the first request without BT device address.

Change-Id: I83b6be229e1ec5906cfec7e5d51def55c4a4a871
CRs-Fixed: 3045210
10 files changed